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Matt... In one of those uploaded pics you supplied....there are 4 zener diodes inside the housing (those 4 black & silver round items look like them). If any one of them has failed (shorted) that will upset the operation of the control mechanism. One can see the diode array in the attached pic

I need to take a good look and compare these two sometime (just haven’t had a chance). Even if not a direct replacement, should easily be able to make something work. I did look into just buying a few replacement relays for my original unit, but that doesn’t help if it’s a broken trace. That and I’m rubbish at soldering haha.

Any idea what the resistors are for Nate? That’s really the only thing that looks different. I’m gonna look up the relays but I can only assume (and I think the wiring diagram confirms, for check again) that both units just have two identical NO relays. So assuming all the wiring to them is the same, requiring the ends should in theory work. I mean it’s just power, one relay for each side, and essentially an end switch to stop the motor once it hits fully open/closed

I have zero issues doing this physically, I just have no idea if the internals of this newer one are the same, and I’m not sure I want to bastardize both and end up with nothing haha I was gonna plug the old one in and close it so I could at least drive it but it makes getting to this piece 1000x more difficult lol edit: I looked over the traces and didn’t visibly see anything that stood out, but given it works sometimes (without any perceivable reason) it may be something I can’t see. I thought about ordering replacement relays but I’m not sure that would work. I’m very tempted to cut wires in the middle and put the old ends on the new wires in the appropriate order and see what happens. I just wish I knew

good looking car....if you need to shop for a new motor and pump I had trouble finding one, so i ended up using one from a 1994 mustang. i had to change the electrical connector, but the hydraulic lines fit perfect. Even the grommets holding it down lined up with the original..